"Snowmobiling has a been a bit of strange one here," he explains.
"Most of them have been bought second-hand from skifields or imported privately. But now that they're available at retail people are getting into it more. A lot of the guys buying are fun-hunters - they've used them overseas while they've worked on skifields in our off-season - so they know just how great they are."
Costing between $12,000 and $20,000-plus, snowmobile buyers include ski-bunnies that fancy a bit of powered hooning, and adventure operators that use them to access out-of-the-way places quickly.
Allen admits that while the snowmobile usage window is just a few months, but that's not radically different to a lot of powerboat users from the Lakes District when the temperature drops.
"They're just good fun, and it's definitely an area that's growing."
Roundhill Skifield at Cardrona will be spurring that growth on August 18 when it runs a hillclimb for the superquick sleds - New Zealand's first snowmobile racing event.
"I'm pretty sure there'll be some carnage," says Allen, "I just hope it's not me!"